jmeter - how to build a request out of a response's results?

Question

I'm looking into Jmeter to load test a webapp.

What is done in the real app when a user clicks a button is : 1. an http request is sent to a server and the response contains a list of ids. 2. another request which is formulated by the list of ids is sent to server. I'm interested in the overall performance of both steps.

for example:

1. send request to http://server.com/getsomething

I get a json looks like:

{"ids":[11,22,33,44,55,66]}

1. I take the ids and build another request like http://server.com/getSomethingElse?

ids=11,22,33,44,55,66

How can I simulate a test like this in jmeter?

Answer 1

You will have to do something of following sort.

• Thread group
  • HTTP Sampler 1 (Send request to http://server.com/getsomething)
    • (one ore more) Regular Expression extractor post processor (Extract IDs).
  • HTTP Sampler 2 (2nd request http://server.com/getsomethingElse?IDs)
  • Tree view listener (To see whats going on)

You may find following beginners jmeter screen cast helpful.

http://my.kpoint.com/kapsule/gcc-e1bad3ad-61cf-4620-9733-e44a74af8a3e/t/jmeter-tutorial-regex-extractor-basics